Thermal comparison of glass furnace operation with oil and natural gas

Natural gas and fuel oil firing are compared for an industrial glass furnace by means of a three-dimensional computer simulation comprising sub-models for turbulence, combustion and thermal radiation. The heat transfer by thermal radiation from the flame and the furnace structure to the glass bath is discussed for both fuels. The total radiative heat flux to the glass is found to be 5 % higher for the case of the oil-fired furnace, while the distribution of heat flux to the glass was found to be less uniform. The heat flux intensities to the glass near the burner are much greater with oil flames because of their greater flame emissivities. But in the regions where combustion is complete heat transfer to the glass from the combustion gases is found to be more intense for natural gas. Comments are made on furnace ageing and pollution emission

Statistical Analysis of the Leadership Perceptions in a Public Administration Office

This Journal is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.The main purpose of this paper is to identify and characterize the leadership features in a public administration office of the Azores (Autonomous Region of the Azores), in orders to verify the existence or not of a positive leadership based on the employees’ perceptions. The main conclusions are attained using data gathered via a previously tested and validated questionnaire. Overall, we conclude that subordinates don’t consider that their leaders show behaviors that they can associate with a totally positive and effective leadership although they are pleased with the fact that they are not extremely controllers and that they seek to do what the majority of the subordinates wants.info:eu-repo/semantics/publishedVersio

Preferential associated anomalies in 818 cases of microtia in South america

The etiology of microtia remains unknown in most cases. The identification of patterns of associated anomalies (i.e., other anomalies that occur with a given congenital anomaly in a higher than expected frequency), is a methodology that has been used for research into the etiology of birth defects. We conducted a study based on cases of microtia that were diagnosed from more than 5 million live (LB)- and stillbirths (SB) examined in hospitals participating in ECLAMC (Latin American Collaborative Study of Congenital Malformations) between 1967 and 2009. We identified 818 LB and SB with microtia and at least one additional non-related major congenital anomaly (cases) and 15,969 LB and SB with two or more unrelated major congenital anomalies except microtia (controls). A logistic regression analysis was performed to identify the congenital anomalies preferentially associated with microtia. Preferential associations were observed for 10 congenital anomalies, most of them in the craniofacial region, including facial asymmetry, choanal atresia, and eyelid colobomata. The analysis by type of microtia showed that for anomalies such as cleft lip and palate, macrostomia, and limb reduction defects, the frequency increased with the severity of the microtia. In contrast, for other anomalies the frequency tended to be the same across all types of microtia. Based on these results we will integrate data on the developmental pathways related to preferentially associated congenital anomalies for future studies investigating the etiology of microtia.Fil: Luquetti, Daniela V.. University of Washington; Estados Unidos. Seattle Children’s Research Institute; Estados UnidosFil: Cox, Thimoty C.. Monash University; Australia. University of Washington; Estados UnidosFil: López Camelo, Jorge Santiago. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. CEMIC-CONICET. Centro de Educaciones Médicas e Investigaciones Clínicas "Norberto Quirno". CEMIC-CONICET.; ArgentinaFil: Dutra, Maria da Graça. Instituto Oswaldo Cruz; BrasilFil: Cunningham, Michael L.. University of Washington; Estados Unidos. Seattle Children’s Research Institute; Estados UnidosFil: Castilla, Eduardo Enrique. Centro de Educación Médica e Investigaciones Clínicas “Norberto Quirno”; Argentina. Instituto Oswaldo Cruz; Brasil. Instituto Nacional de Genética Médica Populacional; Brasi

Os casos de ensino na formação-investigação de professores dos anos iniciais

Este estudo se insere nos processos de formação que investigou as possibilidades dos casos de ensino serem propulsores de processos reflexivos sobre os conhecimentos da docência. Os casos de ensino são narrativas de episódios extraídos geralmente de dados reais do cotidiano escolar e que dão visibilidade às vivências dos professores, os quais, ao analisá–los ou construí-los, articulam e revivem experiências, estabelecendo processos reflexivos e relações entre a teoria e a prática. Para a realização da pesquisa, de abordagem qualitativa, objetivou-se investigar e avaliar as potencialidades dos casos de ensino, enquanto narrativa de episódios escolares, quando utilizados com professores alfabetizadores, ao lidarem com o ensino e a aprendizagem da leitura e da escrita dos alunos, auxiliando-os a reconstruir suas bases de conhecimento para o ensino. Para tanto foram trabalhados casos que retratavam eventos relacionados ao cotidiano das alfabetizadoras que atuam no anos iniciais da educação básica. O processo de formação-investigação foi realizado num ambiente virtual de aprendizagem, na perspetiva de formação continuada de docentes dos anos iniciais. As respostas dos professores participantes apontaram que a adoção de casos de ensino no desenvolvimento profissional dos professores possibilitou que as reflexões se fizessem muito presentes, posto que, ao analisarem as narrativas dos conhecimentos profissionais de colegas e seus, refletiam suas concepções, num movimento reflexivo possibilitador de aprendizagens na/da docência.This study falls in the field of the processes of formation that researched the possibilities of teaching cases being propellers of reflexive processes on knowledge in teaching. Teaching cases are narratives of episodes usually drawn from real daily school life, that bring to light teachers' experiences, establishing reflexive processes and relations between theory and practice. In order to realize this research, with a qualitative approach, it was established the objective of investigating and evaluating the potentiality of the teaching cases as narratives of school episodes, when used with primary school teachers, dealing with the teaching and learning of their students' reading and writing, helping them the re-construe their knowledge foundations in their teaching role. To attain this goal, some cases that pictured events related to the daily work of the primary teachers who play their educational role in the beginning years of basic education. The process of training-research was realized in a virtual learning environment, with a view to an ongoing training of the teachers of the first basic education years. The answers provided by the teachers who participated in the research suggest that the adoption of teaching cases in the professional development of teachers made it possible for the reflexions to become very actual, since, while analysing their colleagues' and their own narratives of professional knowledge, they were reflecting their own ideals, in a reflexive moment that fostered learning in/of teaching.CIEC - Centro de Investigação em Estudos da Criança, IE, UMinho (UI 317 da FCT

Assimilação de metabólitos secundários do milho em adultos de Spodoptera frugiperda.

Poster

Do different casein concentrations increase the adverse effect of rutin on the biology of Anticarsia gemmatalis Hübner (Lepidoptera: Noctuidae)?

The flavonoid rutin is recognized as playing an important role in the protection of plants against lepidopterans. Bioassays with this compound are generally carried out using artificial diets. Proteins of high energy value, such as casein, are important ingredients of insect artificial diets as a source of essential amino acids. However, such proteins can generally increase the allelochemical activity. Our objective was to evaluate the effects of rutin on larvae of the velvetbean caterpillar Anticarsia gemmatalis Hübner by incorporating this allelochemical into diets with different concentrations of casein. Three casein concentrations (0, 7 g, or 14 g) combined with none, 0.65%, or 1.30% of rutin were added to the rearing diet and offered to the larvae from hatching to pupation. Rutin negatively affected larval development, the amount of food consumed, and pupal weight of A. gemmatalis. These negative effects were clearly seen in insects fed on diets with 7 g of casein to which any concentration of rutin was added. The effects of rutin when added to the diets without casein were stronger than in diets containing a suitable amount of casein (14 g). The greater negative effects of rutin in diets containing suboptimal concentrations of casein indicate that casein can increase the effects of rutin only when the diets are nutritionally unsuitable for insect development

Implicação do ácido salicílico na indução de compostos de defesa no controle da ferrugem asiática da soja.

Poster

Induced response of soybeans to phakopsora pachyrhizi inoculation and alternativa products used in organic production system.

Alternative products for soybean Asian rust (Phakopsora pachyrhizi) management in organic production system were tested. Among them, calda viçosa (CV, mixture of Cu, Zn and Mg sulfates), Fish Fertil" (FF, hydrolyzed organic based on crustacean shell and marine fish, rich in chitosan), and sodium silicate (55) were selected for defense induction studies. Sovbean sown in greenhouse, at V3 development stage, was sprayed with alternative products and inoculated or not-inoculated with spores of P. pachyrhizi. Control plants were neither sprayed with products nor fungus inoculated. At O (before treatment) and 72, 96 and 120 hours after treatments, leaves were collected, extracted in MeOH, filtered, and HPLC injected for identification and quantification of compounds. In general, FF + fungus plant treated increased isoflavone concentrations and responded faster than the other treatments. Malonyl genistin, malonyl daidzin and malonyl glycitin concentrations of were approximately, four and 90 times (72h) and two (96h) times greater, respectively, compared to previous analysis, in fungus + FF treated plants. In this treatment, genistein and daidzein concentration also increased at 72h after treatment. Acethyl daidzin concentration increased in most of treatments, but was bigger in FF + fungus, 72h after treatment. Aglycones (genistein, daidzein and glycitein) concentration was lower compared to glycosides. However, FF has been exhaustively tested for management of phytopathogens in flowers and fruits, its role in soybean disease management needs additional experiments. Thus, for further elucidation P. pachyrhizi management by using FF,tests with pure chitosan is the next step of our studies

Experimental quasi-static out-of-plane test of a U-shaped brick masonry wall

Past earthquakes demonstrated the vulnerability of brick masonry façade walls even against moderate earthquakes. The present work aims at providing an insight into the out-of-plane response of clay brick masonry walls, especially focusing on a traditional Portuguese building typology, namely the ‘placa’, towards a correct interpretation and assessment of their seismic behaviour. A thorough experimental campaign in laboratory environment was conducted, including material characterisation through destructive and non-destructive techniques and the quasi-static test with airbag on a U-shaped clay brick masonry specimen. Main experimental results are discussed with specific attention to the analysis of the masonry wall cyclic response, the damage pattern, the seismic performance, and the evolution of the modal parameters at distinct stages of the test. The material characterisation demonstrates the low mechanical properties of the masonry associated with such buildings. The specimen presents a stiff and almost linear behaviour until the peak, followed by an initial softening until about 60% of the peak. The damage pattern evidences a failure governed by an out-of-plane rotation combined with shear sliding.This work was financed by FCT/MCTES through national funds (PIDDAC), within the scope of the project “RESIST-2020 – Seismic Rehabilitation of Old Masonry-Concrete Buildings” (PTDC/ECI-EGC/ 30567/2017). This work was partly financed by FCT/MCTES through national funds (PIDDAC) under the R&D Unit Institute for Sustainability and Innovation in Structural Engineering (ISISE), under reference UIDB/ 04029/2020, and under the Associate Laboratory Advanced Production and Intelligent Systems ARISE under reference LA/P/0112/2020